Coke-oven door.



W. W. MAOFARREN.

GOKE OVEN DOOR.

Patented Dec. 3, 1912.

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WALTER W. MACFARREN, OF PITTSBURGH, PENNSYLVANIA.

COKE-OVEN DOOR.

Specication of Letters Patent.

Application filed August 24, 1910. Serial No. 578,720.

To all whom it may concern:

Be it known that I, VALTER W. MAcFAR- REN, a citizen of the United States, residing Aat Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in i Y metal frame 6 may be of any desired con- Coke-Oven Doors, of which the following is a specification.

My invention relates to coke oven doors suitable for any style oven.

The drawings show a door adapted more particularly for a rectangular or Belgian oven, but my invention may -be equally well applied to bee-.hive ovens. I have shown a door in two sections, but it is obvious that it could be made as asingle door by combining the two sections shown or as a door in four sections by sub-dividing the sections shown, all of these arrangements being in common use.

The specific object of my invention is to provide a door in which the bricks used will not be' readily disintegrated by expansion and contractiom The construction of a cheap and durable coke oven door is a dif- 4ficult matter, owing to the vintense heat on lfollowing characteristics 1st. Cheapness: (a) The frame must be light and strong. (b) The bricks must be simplein shape and `easy to place.

2nd. Durability: (a) The metal frame must be completely protected from the di- (b) The 'bricks must be supported in such a manner that. `Strains will not be set up ,in them or in the frame by changes of temperature and that no sliding action of the bricks on each other can occur.

My invention comprises, therefore, means for accomplishing the desired results above and more particularly the latter.

Referring to the drawings Figure 1 is an elevation of a complete door according to my invent-ion showing it in position on the oven and closed. Fig. 2 is a vertical sectionalelevation .of the same, and Fig. 3 is the rear view of half the door, showing the bricks only with the metal. frame removed.

Numeral 1 indicates the door plate, and

l l the numeral 2 a door frame which may be secured in any suitable manner to the face of the oven. The door frame 2 is provided with lugs 3 to which are hinged the upper door section 4 and the lower door section The lower door section 5 is composed ot a metal frame 6 having the arms 7 which latter are connected to t-he lugs 3 by means of a bolt S'forming a hinge for the door. The

struction. either in one piece as shown or in several pieces secured together in any desired manner. The frame 6 is provided with dove-tailed grooves 9. One end of the dovetailed grooves 9 is closed by a lip 10 and the other end is left open for the insertion of the bricks 11. The bricks 11 are of any desired size, being in thedesign shown about 10 x 11 X 2%. The bricks 11 are provided at their rear side with a dove-tailed lug 12 which is a loose fit in the dove-tailed groove 9 of the frame 6. The bricks 11 for the lower door section 6 comprise two horizontal rows, there being shown tive bricks in each row. vThese bricks are successively slipped into the dove-tailed grooves 9, one against the other.v The size of the bricks is such, and the space between the grooves 9 is such, that a clearance space 13 is left between the edges of the bricksl in adjacent rows. Clearance space 14Jis also left between the lower edge of the lower row of bricks and the door plate 1, anda clearance space 15 is left between the upper edge of the lower door section and-"the lower edge of the upper door section. The frame 16 for the upper door section is provided wit-h arms 17 connected by-a bolt 18 to the npper lugs 3. The upper frame 16 is similar to the lower frame 6 and differs from it chiefly in the fact that the dove-tailed grooves for the bricks are verticalinstead of 9 tical rows of brick in the upper section. Ac`

elearan space 24 is also left between the upper edges of the bricks in the. upper door section '16 and the arch 23 in t-he oven wall, this opening beingused' for the admission of air to burn the char e of coal as is well understood. The clearance spaces 13, 14,

A15 and 20 and the clearance spaces 21 and Patented Dec. 3, 1912.

22 at the sides of the door are luted with clay to prevent the ingress of air. The doors are, of course, luted each time the oven is drawn. It will be observed that by reason of the projection 12 of the' bricks l1 lhaving a loose fit in the dove-tailed grooves of the frames G and 1G, that they are free to move end-wise in the grooves. It will also be seen that since the adjacent rows of brick are not set tightly together, but are provided with clearance spaces between them that each brick may expand in a direction at right yangles to the dove-tailed grooves supporting it with perfect freedom. It will thus be seen that I have provided means for *holding the bricks in their frames in a secure manner and at the same time have allowed the necessary freedom for expansion andi contract-ion, and further that the door is easily made air tight by lutingas described..

It is obvious that vario-us modifications of thedesign shown may be made without departing from the spirit of my invention,

`all of such changes and modifications being Within the province of those'skilled in the arts of'building and operating coke ovens,

and I therefore, do not wish to be confined to the precise construction and arrangements of parts shown, but desire'to claim and hold as mine all the patentable subject matter covered by the following claims.

l claim- 1.` In a coke oven door, a metal frame, a protective lining therefor made of refractory material, said lining being loosely mounted on said frame vso as to permit of free expansion and contraction in all vdirections.

2. In a coke oven door, a metal frame, a sectional refractory lining therefor, and means for loosely mounting the sections of said lining, so they can expand or contract freely with reference to each other or to the frame.

j 3. In a coke oven door, a met-al frame, fire n brick supported thereby in rows, the bricks in adjacent rows being set with sufficient initial clearances to permit of free expan sion between the adjacent rows of bricks, and the bricks in each row being set incontact with each other and set loosely in said loosely engaging saidbricks', and arranged to permit free expansion of the bricks lengthwise of Ithe rows.

5. In a coke oven door, a metal frame, a protective lining therefor comprising fire brick so set as to form a substantially flat unbroken surface for the'inside ofthe door, and means for loosely supporting said brick so as to allow of their free expansion in all directions. l 'v U. In a coke Voven door, a metal frame, grooves formed on the inner side thereof, a lire brick lining for said door, and projections on the back of the bricks engaging said grooves to hold the bricks in place, the Whole arranged to permit of free expansion of the bricks in all directions.' i

7. In a coke oven door, a metal frame, and.

a fire brick lining therefor comprising individual bricks loosely mounted on said frame so as to allow of free integral expansion of allv the bricks in all directions and free movement of all the bricks with reference to the frame in one direction.

8. In a'coke oven door, a metal frame and a fire brick `lining therefor comprising individual bricks so spaced apart that the clearance between any two bricks when cold will be at least equal to their combined lineal expansion toward each other` when hot.

A. H. KIRKER, CHAs. Lorena/IAN.

Copies of this patent may be obtained for five cents each, by 'addressing the Commissioner of Patents, Washington, D. C. 

